Anecdotally, programmers dislike "reduce"

2026/09/14 15:46

Anecdotally, programmers dislike "reduce"

RSS: https://news.ycombinator.com/rss

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In short: from my experience, people like map and filter, but not reduce.I use functions like map and filter all the time. When I put that code up for review, my peers rarely complain. I get plenty of feedback about other decisions, but not about my use of map and filter.I cannot say the same for reduce. Often, when I’ve submitted a patch with reduce inside, I get a comment like, “this part is hard to read.” And I see reduce way less than map, filter, some, and so on.Anecdotally, I have come to believe that programmers don’t like reduce as much.I don’t know why, but I have a few theories:reduce is harder to read.reduce is less familiar.reduce can have worse performance compared to other options.reduce is less elegant in languages I use, like JavaScript, Python, and Swift. In my blissful stint as a Clojure developer, I did not get this feedback.I’m wrong, and I’m seeing a trend that’s not real.I usually just change reduce to something else and move on. Even though I prefer it, I don’t usually care much. But it’s a little social phenomenon I’ve observed, and I thought I’d document it.I’ve also noticed this less recently, possibly because code review is less thorough nowadays.Do you notice this? Do you like reduce? Please tell me.

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